Water-circulating apparatus for steam-boilers.



No- 327,20s. PATENTEDJULY 31,1906.

- J. N{BARNU M.

WATER OIRGULATING APPARATUS FOR STE-AM BOILERS.

APPLICATION PILBPYSEPT. 2a. 1905.

gvwewtoz l V A QM I if; A fl/ZWQ TH: NORRIS PETERS 5a.. wAsmNarou, v. c.

UNITED. STAT-ES PATENT QF QE J N BAR UM; e ie ttem 0e 0- W EB'QIRQLATINQ AP A A TQ$ F95 FEA'YPBQ'FEfi:

Specificqtip of Letters Rettmt. e eee e tee eee e. 0. e ett ve e IPatented. uly 31 1996 Q? t? whem it "my en e 9f the feedrweter, the ifeue i h end W t? .eet eh e ng p o u ed y the eelnhi e n e heile et f ed-Wer P r fier hite e e e hee e end Wh el e se es hiits eetieh te edue e apd e eele i Q Wete in th heifer h eelid W ie e m he eedime t in a b i eenter y Weyv e h f e -w t et p- Ply, end e fore they ust eithe b reme edb f re he nt r he'hei t r ee e- 'jggslted therein; With this invention aCireu eti h is Pl'QY d d Wh on in through the purifier, andhenpe anyimpurities et em v at s t y he eet d 511d remeved eubeeq ht y- A p rt ee ventege o h is tha i el t e Who b il r el n e isp nse w t t e te f held m dr r m a su h, e ilit sj ee e te generatqr in addition to theother parts of the h f r- V It is known that a rapid circulation inWeterbe boiler e eel ed y ed n e ee being her eter zed'ee he li of e' t''rrt h he ler- It es? be n feu y expe men at e v y f W ter o w milee Phee in he ubular ystem o bl the fi e n y e th heile 'in he'e 'eb etptiema d t ei ee e eh e e m impe n he eeethe d f e tehee n tempet u e e weene he giviug and heatateeeiving elements thatis,

"the greatenthe' temperature of the ater Q1 the newe t eppre h ha of ethe h t' eter the eeee ity for pid e e -e Such circulation also reducesthe liebilitybf sudden expansipu and eontracti qn tap a minill end eects he mee p ett t'eWe te line obtainable in e bei er f t e l n ide eeenneeti t een these s Qt eIIW e h e hro gh the ube? Qt h boiler,' andsaid connection has g sipher tion lev l an ny ex essive flu'etue i Thiin tiqh ev -id he tiete e y'fif any Steie -epe e. f r the t r ef impties 'wh eh my enter the. b iler; be'eet'ee such spate "sleitr eete sthat mi eh.tr'ehh he thr ilefb etteet vee eee 9 he h il Yetitieh e y pert.e he 'he lefte tfih it duty in steam 'eh te eh he eilt e ion' e effeeed by m ehe Qt Wh eh ehde e e ree hy d tee 111 te h ete eh the eeereteeee- Ve y editg a heating thud pun ing de pettie'ted eeteid'e hflet. 'Sue.,g1evic e ieht y t due e ew nd de' et h'ed h h t d Stat le Pee e 1775 eli t e 'v tie 1e t letie ed n' eilhe i e fe d ete he t t ndlti er e m- Pti ee e y iid e ee'eel 6, Wjeh; wth i 'e e 7 terms Otteee'ihg 9 theheetet. At the b t i e ed meht he hher '1 teem which amttte eeetrt ttbmeht wat an he l 1 'e ei p ee p t te wt fe depee te ettetl we' i t't e zh' h P pe 2 W e e e de i'ed- Theffeedwtte t le? .3ee'd iigt the heat r, s ef u fi eh eepeeity t s pp y the bj le't"- T e'hz Weter P p 1. is 'e e t e e t e peei teh t he fe d-We er he t tl lei eelytq a1 o hetiefth t! l t be er Th f Wate is d cha e hlbl glltl e few 1which is eh e 'etl tr tm ed I ieh "ente s thr the 'h twejter pipinjecting b hfeed e d ee g'we te o ,e' e e t Pl t '0, whi h e e fi e iteter end m k e't e die easy. The W v It' r the tei s eer he-tel? 1 f theylin e endd w thidl ght he W eh 'e id eyl hder d he outer ftet" Wh ekeeen "eptfet e thro gh' he' intlet t, w'hi h t een a h he tehl t t e elhef eh p 1'i hd' e the the ib i l t will be etieed thle ttl l P eit Q heeyl' hdet 9 i eil'tlt enil the 9 the t be 15, Wh h e ten s nto h eylocity of the water in its upward course is greatly reduced, whichfavors the dropping of sediment in the quiet space 11. This constructionis substantially that shown and described in my patent above referredto.

The boiler is of the usual Stirling type, comprising an upper drum D,into which the feed-water enters, connected by tubes T to the lower drumB, which is connected by sets of tubes T to the pair of steam-drums Oand C. The drums C and D have steam connec tions S, and the drums C andC have steam and water connections S and W.

It is to be noticed that the lower or mud drum B instead of beinglocated beyond the bridge-wall of the furnace is positioned di rectlyover the fire in direct line of the heat, and, in fact, the whole boileris so placed that all of its parts will receive the most intense heatpossible, since with the circulation provided by my invention it isunnecessary that any part of the boiler should be kept cool orrelatively cool, all parts being utilized for generation. Heretofore theway these boilers were set about nineteen per cent. of theheating-surface of the boiler absorbed fifty per cent. of the heat, sothat this nineteen per cent. of heating-surface generated fifty percent. of the steam. By my invention and the rapid circulation inducedthereby all parts of the boiler may receive a share of the heat and willreceive nearer a proper proportion.

The hot-water pipe 14 leads from the middle drum 0 to the purifier,opening into said drum just below the low-water line and as near saidline as possible. The supply-pipe 21 from the purifier dips into thedrum D and has its outlet lower than the inlet to the pipe 14. Most ofthe steam generated by the boiler is generated in the first and secondbank of tubes T, whereby the water-line of the first and second drums Cand C is buoyed up and held at a higher level by the rising currents ofsteam, and any rise of water-level in sald drums Wlll accordingly lowerthe water-level in the drum D, producing a siphon action through thepurifier in consequence of the greater weight of water in the leg 21.This action is automatic with the operation of the boiler and isassisted by the injection of water through the feed-water pipe 13 andnozzle 16, the result being that a relatively large quantity of water isdrawn u through the pipe 14 and fiows down throug the pipe 21 aftermixing with the feed-water needed to supply the loss by steam. Acorrespondi 'ing circulation is thereby produced down through the bank Tand through the drum B and up through the banks T and the steamdrums Cand O. In short, the purifier'and heater and its connecting-pipes form asiphon connection between the drums O and D,

which tends to keep the levels in these drums equal and sets up acontinuous water circulation through all parts of the boiler. Thiscirculation is augmented when the feedpump or injector is in operation,because the weight and force of the feed-water is being added to thelonger leg of the siphon. This keeps up a continuous circulation ofwater through the entire heating system, including the lower drum B,which keeps all parts swept clean of deposits. The purifier performs itsheating and purifying function as described in my patent above referredto; but should any matter escape collection in its first passage throughthe heater it is at once carried by the water-currents through theboiler and to the drum C, where it is picked up by the hot-water pipe 14and carried again to the purifier. This action is continued as long asthe boiler is in operation, whereby all the impurities are collected inthe purifier-space 11 and no deposits can find lodgment in any portionof the boiler.

As above indicated, the circulation provided is decidedly advantageousin the generation of steam and greatly increases the eificiency. Thechange of the so-called muddrum into a steam-generator adds reatly tothe efficiency of the boiler. A high temperature is maintained by reasonof the circulation throughout all the parts of the boiler.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination with a steam-boiler having banks of uprightwater-tubes terminating in headers at the top, of a feed-water heaterand purifier having connections with the respective headers arranged toprovide a flow of water through the heater and purifier from one headerto another, and also having a feed-water supply.

2. The combination with a water tube boiler having drums at the upperends of separate banks of upright tub es, of a siphon connecting saiddrums and embodying a purifying-chamber for the deposit of sediment.

3. The combination with a water-tube boiler of the Stirling type, of afeed-water heater and purifier located above the same and having ahot-water pipe connected to one of the front or steam drums and a su])-ply-pipe connected to the rear drum, said heater and pipes providing acirculation between said drums.

4. The combination with a furnace, of a steam-boiler having upper drumsand a lower drum, connected by water-tubes, the lower drum being locatedin the combustion-chamber of the furnace and the upper drums beingconnected to each other by a siphon into which the feed-water isdelivered.

'5. The combination with a water-tube boiler having separate drumsconnected by water-tubes, of a feed-Water heater and puri- In-testimonywhereof I have signed my fier having a hot-Water pipe which dips benameto this specification in the presence of 10 low the Watier in thellilotierc'1 or bstfamil drum two subscribing Witnesses.

and a supp ipe W ic ips e ow t e water in the o fer. or rear drum, saidheater JOHN BARNUM' and pipesprovidi-ng for a flow of water fromWitnesses: the former drumto the latter, thereby in- JOHN A. BOMMHARDT,ducing a circulation through the boiler-tubes. SHIRLEY BOMMHARDT.

